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Watch Castle Season 6 Online

Will Kate find the perfect dress? Can they find the perfect venue? And can Kate ditch her first husband she didn't know exist? As Rick and Kate plan their wedding, you'll want to watch Castle season 6 online here at TV Fanatic.

When the body of an infamous mobster who disappeared in the 1970s is found, Castle and Beckett find one remaining witness. But since he still believes it's the '70s, they must act like his delusion is real in order to find their killer.

When a Wall Street Trader is murdered the investigation is complicated when they find out the victim was a confidential informant for a US Attorney who happens to be Capt. Victoria Gates' estranged sister on Castle.

When a woman confesses to murder, she tells the detectives details only the killer would know, but when someone else confesses with the same knowledge Castle and Beckett realize this case is more mysterious than they originally thought.

On Castle, Alexis asks her Rick for help when her Innocence Review case involves a man on death row. With only 72 hours to go, can father and daughter work together to prove his innocence...or is he truly guilty?

When a young woman is put into a ritualistic pose after being brutally murder, Castle thinks the symbols find in her apartment are part of a Da Vinci Code type conspiracy. Alexis and Pi move into their own place on Castle.

The murder of a former teen star from a '90s high school sitcom takes a strange turn when Beckett and McCord arrive at the 12th to take over the case and find a new detective at Beckett's desk on Castle.

Will she or won't she? We learn Kate's response to Rick's major question on the Castle Season 6 premiere.

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You'll want to watch Castle season 6 online here at TV Fanatic to see Rick Castle down on one knee proposing to Kate Beckett on their swings. She's got one caveat. She wants to take the job in Washington D.C. but Castle see no problem. Whatever she decides, they'll work it out together.
When things don't go according to plan in D.C., Beckett ends up without a job. Eventually both she and Castle end up back at the 12th precinct solving crimes for the NYPD.
As Rick and Kate enjoy their engagement, they begin planning their wedding and Kate goes through not one, but two different dresses. Will the wedding be in the Spring or in the Fall and where is the perfect wedding venue?
But everything goes haywire when Kate finds out that she was once married as a teenager in Las Vegas and it's still considered legal. Mayhem ensues as she must find her wayward "husband" and get him to sign papers to end their marriage.
With all of that behind them, Rick and Kate expect their happy ending as they head to their nuptials in the Hamptons but when someone runs Rick's car off the road, Kate is called to the scene to find his car in flames. What happens next? You'll want to watch Castle Season 6 online to find out.